Provable Guarantees for Spectral Structured Prediction
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Computer Science > Machine Learning
Title:Provable Guarantees for Spectral Structured Prediction
Abstract:Structured prediction is the simultaneous prediction of multiple labels, and is widely used in various fields, such as natural language processing and computer vision. In this paper, we study binary node label recovery on signed graphs with edge-flip noise, a model introduced by (Globerson et al., 2015), via a simple spectral method that decodes node labels from the signs of the principal eigenvector of the noisy signed adjacency matrix. We develop graph structure-agnostic theoretical guarantees for approximate inference of node labels as well as guarantees for maximum angle deviation with respect to the ground truth node labels. By leveraging tools from matrix concentration theory and eigenvector perturbation analysis, we derive new concentration inequalities that explicitly quantify the effect of the spectral gap of the adjacency matrix, number of nodes, degree distribution, and noise level. As a corollary, we relate our general results to the Cheeger constant and provide results for different classes of graphs. We perform several synthetic experiments to validate our theory. To the best of our knowledge, we are the first to provide theoretical guarantees for the spectral-based approach. As a byproduct of our analysis, we derive technical results that might be of independent interest and useful for other machine learning problems.
| Subjects: | Machine Learning (cs.LG) |
| Cite as: | arXiv:2609.18527 [cs.LG] |
| (or arXiv:2609.18527v1 [cs.LG] for this version) | |
| https://doi.org/10.48550/arXiv.2609.18527
arXiv-issued DOI via DataCite (pending registration)
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